And on to the correct way to do it with the AVH-"x"400 Series
It has changed on the newer ones AVH-"X"500

Although it is illegal to view while driving.
Pin 85 and 87 go to ground "black wiring in pioneer harness
pin 30 goes to the light green wire in the pioneer harness
pin 86 goes to the blue with white stripe wire in the pioneer harness